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Articles 301531 - 301560 of 302510

Full-Text Articles in Physical Sciences and Mathematics

Nebraska Green Quartzite An Import Ant Future Industry, Erwin H. Barbour Jan 1915

Nebraska Green Quartzite An Import Ant Future Industry, Erwin H. Barbour

Conservation and Survey Division

ln southern Harlan and Franklin counties, there occur many acres of green quartzite which must be of commercial consequence when made available. It is a neglected resource upon which important industries are sure to be based. With the development of this bed in view, the Nebraska Geological Survey has examined this area. and through this leaflet wishes to place the results before possible investors.

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A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook Jan 1915

A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook

Conservation and Survey Division

During the field season of 1913, while exploring the Pliocene beds of Brown County, Mr. A. C. Whitford, a Fellow in the Department of Geology, University of Nebraska, discovered the mandible of a new machaerodont cat. His work in this region was in the interest of the Nebraska Geological Survey and the Morrill Geological Expeditions.1

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Notes On The Geology Of Sioux County, Nebraska, And Vicinity, H. J. Cook Jan 1915

Notes On The Geology Of Sioux County, Nebraska, And Vicinity, H. J. Cook

Conservation and Survey Division

No abstract provided.

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The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson Jan 1915

The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson

Conservation and Survey Division

No abstract provided.

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Nebraska Green Quartzite - An Important Future Industry, E. H. Barbour Jan 1915

Nebraska Green Quartzite - An Important Future Industry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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The Round Ligament Of Nebraska Proboscideans, E. H. Barbour Jan 1915

The Round Ligament Of Nebraska Proboscideans, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour Jan 1915

A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A New Mammoth, "Elephas Hayi," From Crete, Nebraska, E. H. Barbour Jan 1915

A New Mammoth, "Elephas Hayi," From Crete, Nebraska, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A Phenomenon Of The Kansan Drift In Nebraska, Erwin Hinckley Barbour Nov 1914

A Phenomenon Of The Kansan Drift In Nebraska, Erwin Hinckley Barbour

Department of Earth and Atmospheric Sciences: Faculty Publications

Among the minor phenomena of the glacial drift in Nebraska there is one which, though rarely observed by the public, is of interest and should be commended to the attention of naturalists. The reference here is to certain large, well-defined masses or blocks of such materials as sand, gravel, and coarse pebbles, which occur imbedded in the drift clays along with glacial bowlders, and which presumably have been similarly transported and deposited. These masses or blocks vary widely in color, texture, and kind. They also vary from the glacial matrix in which they are found and are the more striking …

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Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson Jul 1914

Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson

Journal of the Minnesota Academy of Science

No abstract provided.

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Tributes From Early Associates Jul 1914

Tributes From Early Associates

Journal of the Minnesota Academy of Science

No abstract provided.

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Newton Horace Winchell, 1839-1914, Warren Upham Jul 1914

Newton Horace Winchell, 1839-1914, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

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Contributions Of N. H. Winchell To The Geology Of The Iron Ranges Of Minnesota, W.H. Emmons Jul 1914

Contributions Of N. H. Winchell To The Geology Of The Iron Ranges Of Minnesota, W.H. Emmons

Journal of the Minnesota Academy of Science

No abstract provided.

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Words Of Appreciation, O. W. Oestlund Jul 1914

Words Of Appreciation, O. W. Oestlund

Journal of the Minnesota Academy of Science

No abstract provided.

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Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard Jul 1914

Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard

Journal of the Minnesota Academy of Science

No abstract provided.

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The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr Jul 1914

The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The profitable cultivation of the non-irrigable lands in west central and western Nebraska is limited by the amount and efficient use of the precipitation. There are tracts of land in the sand hills and minor tracts of badly worn heavier soils where the need of soil fertility is becoming evident. But, in the main, the great problem at present is not one of soil fertility, but of how to get enough water to make use of the fertility now present. The rainfall of this section, which varies from an actual shortage to seldom more than a meager sufficiency, makes it …

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A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark Jun 1914

A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark

UNM Bulletins

The author reports on the results of sixty experiments on processes related to the enrichment of the sulfide ores of copper. Also submitted to Leland Stanford Junior University toward the Degree of Doctor of Philosophy.

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Bulletin No. 134 - The Nitric Nitrogen Content In The Country Rock, Robert Stewart, William Peterson Jun 1914

Bulletin No. 134 - The Nitric Nitrogen Content In The Country Rock, Robert Stewart, William Peterson

UAES Bulletins

In many arid sections of Western America there have been reported marked accumulations of nitrates in the cultivated soil. Hilgard,(1) who was the first to observe these accumulations, believed that the nitrates are being formed at the present time by the rapid nitrification of the organic matter contained in the soil. In Colorado there has been considerable trouble with orchards dying; the death of the trees in some cases has been attributed to the excessive accumulations of nitrates in the cultivated soil. These accumulations are due, according to Dr. Headden,(2) to the fixation of atmospheric nitrogen by bacteria now at …

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Some Phenomena Which Accompany The Electrolysis Of Certain Salt Solutions, When The Electrodes Are Physically Separated By Means Of A Diaphragm Of Solid Gelatine, Containing The Same Salt As Is Used For The Electrolyte: A Study Of The Automatic Termination Of The Electrolysis, When Conducted Under The Above Conditions, Ernest Carl Wagner May 1914

Some Phenomena Which Accompany The Electrolysis Of Certain Salt Solutions, When The Electrodes Are Physically Separated By Means Of A Diaphragm Of Solid Gelatine, Containing The Same Salt As Is Used For The Electrolyte: A Study Of The Automatic Termination Of The Electrolysis, When Conducted Under The Above Conditions, Ernest Carl Wagner

Chemistry Honors Papers

This 22 page thesis is a record of work done during the summer of 1910, by Dr. W. H. Stoner, and during the summer of 1912 and the spring of 1914, by the writer, in the Chemical Laboratory of the Medico-Chirurgical College of Philadelphia.

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Portland Cement, Asphalts And Bitumens, George R. Ensminger May 1914

Portland Cement, Asphalts And Bitumens, George R. Ensminger

Chemistry Honors Papers

This 37 page thesis classifies and analyzes cements, rock asphalt and bitumen.

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Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish Apr 1914

Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish

Department of Physics and Astronomy: Faculty Publications

The first quantitative investigation of absolute phase change was made by Quinckel in 1872. This was followed by that of Wernicke, Wiener, Glan, Hennig, Drude, Koenigsberger and Bender. All these investigations were confined to the visible spectrum except that of Koenigsberger and Bender, who, in addition, measured for a few substances the phase change in the infra-red. So far no measurements of this phenomenon have been made in the ultra-violet.

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A Comparison Of Missouri Sandstones, Llewelyn Lodwick Jan 1914

A Comparison Of Missouri Sandstones, Llewelyn Lodwick

Bachelors Theses

"Because of the scarcity of fossils in sandstones, the ages of these stones are difficult to determine except by the fossil bearing rocks either above or below them. Consequently, sandstones, even of the same area, are often separated and correlated with difficulty. It is for this reason that an effort is made to determine a means by which each sandstone may be identified"--Introduction, page 1.

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The Determination Of The Critical Sizes In Table Concentration, Julius C. Miller, John N. Webster Jan 1914

The Determination Of The Critical Sizes In Table Concentration, Julius C. Miller, John N. Webster

Bachelors Theses

"It has been observed in table concentration that the ore band consists of the coarest sic particles of ore on the bottom or low side. Further up on this ore band the coarse particles grade into finer particles, until a certain marked degree of fineness is reached by which the mineral can no longer adhere to the table top, but must be carried over by the wash water as slimes. To determine the critical size of ore of practical value which will remain in the concentrates band, under certain variable conditions, is the purport of this thesis"--Object of Experiment, page …

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An Investigation In Concentrating A Certain Tailing On Wilfley Tables, Theodore Saunders Dunn, Roy Nicoll Mcbride Jan 1914

An Investigation In Concentrating A Certain Tailing On Wilfley Tables, Theodore Saunders Dunn, Roy Nicoll Mcbride

Bachelors Theses

"The object of this investigation was to determine the adaptibility sic to concentration on a Wilfley table of a certain tailing carrying silver, lead, and zinc. The material was from the tailing dump of the Red Elephant Mine, operated by the Danaher Mining and Milling Company, of Hailey, Idaho, who are now considering treating this material if it can be done economically"--page 2.

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Flotation Applied To Basic Ores, Orion Dexter Neal Jan 1914

Flotation Applied To Basic Ores, Orion Dexter Neal

Bachelors Theses

"Concentration, by flotation, as used in to-day is limited to the ores containing an acid gangue. Although, it is probable, that in a few instances flotation schemes are being used on certain ores containing basic gangue, the processes are carefully guarded as trade secrets. It was with ores containing basic gangue that the experiments embodied in this thesis were made, in an effort to determine some means of concentration and also to determine the best conditions for some of the varying factors"--page 1.

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Estelle Angier Science Notebook, M. Estelle Angier Jan 1914

Estelle Angier Science Notebook, M. Estelle Angier

Scrapbooks

1914 science notebook of Estelle Angier (Class of 1914). Class notes, descriptions of experiments, and conclusions. Angier added an additional note at the end of the notebook in 1971.

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Plant Tissue In The Carboniferous Shales Of Nebraska, Erwin H. Barbour Jan 1914

Plant Tissue In The Carboniferous Shales Of Nebraska, Erwin H. Barbour

Conservation and Survey Division

While exploring the newly discovered Eurypterid beds,1 just one mile south of Peru, Nebraska. November 8, 1912, the writer found unusual amounts of actual plant tissue of Carboniferous age. It seems incredible that it should have been preserved through such a lapse of time. Only the most resistant tissue could have endured. When freshly cleaved, the Eurypterid shales reveal innumerable bits and patches of it, mostly bright red in color.

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